. >> woodruff: we just saw michelle obama, the first lady, talking with one of those special guests. and again i'm reminded that's the mother of the 15-year-old teenager, young woman. she performed at the president's inauguration from chicago. she went home to chicago and then was gunned down in a shooting that was said to be just a mile or so from the president's house. >> that's right. and two people were arrested yesterday. >> woodruff: and one of the points the white house has been making is that gun violence is not something distant. it touches many many families in this country. that's one of the points. >> that's a realm where i think there's some possibility of some legislation. i'm not sure it will be as ambitious as what the president proposed but some sort of background check, magazine things. so again if you bracket some of the really divisive issues, you can get small steps down at least. >> woodruff: what we're going to hear from the president tonight is he's going to make a push, we're told, to ban assault weapons and to do something about background checks, tighten up